In researching further, an analyst found the workaround may be somewhat resolved by:
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On my system, if I click over 2 data driven pages, then click back one, the second page exports correctly also. However, this workaround does not work on the customer's systems!
The hang appears to occur when the single arrow, to change over one page, in the Data Driven Pages is clicked. If the single arrow is clicked twice, the next page exports.
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The bug is listed high priority but I don't see a planned resolution date.